docs: def to_value(self, units=None, equivalence=None, **kwargs):
          """
          Creates a copy of this array with the data in the supplied
          units, and returns it without units. Output is therefore a
          bare NumPy array.
  
          Optionally, an equivalence can be specified to convert to an
          equivalent quantity which is not in the same dimensions.
  
          .. note::
  
              All additional keyword arguments are passed to the
              equivalency, which should be used if that particular
              equivalency requires them.
  
          Parameters
          ----------
          units : Unit object or string, optional
              The units you want to get the bare quantity in. If not
              specified, the value will be returned in the current units.
  
          equivalence : string, optional
              The equivalence you wish to use. To see which
              equivalencies are supported for this unitful
              quantity, try the :meth:`list_equivalencies`
              method. Default: None
  
          Examples
          --------
          >>> from unyt import km
          >>> a = [3, 4, 5]*km
          >>> print(a.to_value('cm'))
          [300000. 400000. 500000.]
          """
          if units is None:
              v = self.value
          else:
              v = self.in_units(units, equivalence=equivalence, **kwargs).value
          if isinstance(self, unyt_quantity):
              return float(v)
          else:
              return v